Description

Pigment Yellow 191 is a high-performance, green-shade yellow organic pigment. This product is valued for its excellent color strength, good lightfastness, and strong solvent resistance, making it a reliable choice for demanding applications. It is primarily used by manufacturers in the plastics, coatings, and printing ink industries seeking vibrant and durable yellow coloration.

Application

• Plastics Coloring: For coloring a wide range of polymers, including PVC, polyolefins (PP, PE), and engineering plastics, offering good heat stability and dispersion.
• Industrial Coatings: Used in automotive OEM and refinish paints, coil coatings, and general industrial finishes where durability is critical.
• Printing Inks: Formulation of high-quality packaging inks, publication gravure, and flexographic inks requiring good printability and color consistency.
• Masterbatch Production: A key component in the manufacture of color and additive concentrates for the plastics industry.
• Synthetic Fibers: Mass pigmentation of fibers such as polypropylene and polyamide for textiles and carpets.
• Leather Finishes: Provides bright and fast coloration in finishes and coatings for leather goods.

Basic Information

Product Name	Pigment Yellow 191
CAS No.	129423-54-7
Molecular Formula	C18H18N4O6
Molecular Weight	386.36 g/mol
Synonyms	Pigment Yellow 191; C.I. Pigment Yellow 191; PY 191; 129423-54-7; Benzoic acid, 2-[[1-[[(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)amino]carbonyl]-2-oxopropyl]azo]-; C.I. 18795; Yellow Pigment 191; Hansa Brilliant Yellow 5GX; Permanent Yellow GG
EINECS	Contact for details

Quality Control

Our Pigment Yellow 191 is manufactured under a strict quality management system. Every batch is tested against rigorous internal specifications for key parameters such as color strength, hue, particle size distribution, and chemical purity to ensure consistent performance and reliable supply. A Certificate of Analysis (COA) detailing these results is provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from incompatible materials and sources of ignition.

Specification

Item	Specification
Appearance	Yellow Powder
Color Strength	95 - 105% (vs. Standard)
Hue	Within agreed tolerance
Particle Size (D50)	< 1.0 µm
Volatile Matter (105°C)	< 2.0 %
pH Value (10% Aqueous Slurry)	6.0 - 8.0
Oil Absorption	40 - 60 g/100g
Lightfastness (1-8)	≥ 6
Heat Stability (Plastics, 5 min)	≥ 260°C

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.